let a = 119999999;
let b = '' + a / 1e8;

Assert(b == '1.19999999');


a = 12332;
a /= 1000;
Assert(a == 12.332)
a /= 10;
Assert(a == 1.2332)
a += "";
Assert(a == "1.2332")

a = 432748579.472395;
a += "";

Assert(a == '432748579.472395');